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Preview: Electronics Infoline

Electronics Infoline



A giant collection of electronics projects and schematics on the web!



Last Build Date: Thu, 29 Sep 2016 20:32:53 +0000

 



BQ24650 Based MPPT li-ion Battery Chage Controller With Software MPPT adjust and 3 Channel LED PWM dimming.

Thu, 29 Sep 2016 18:41:00 +0000

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Pinned onto Circuitvalley

In the addition to the little solar lighting project that i was working on i have created this little solar charge controller to charge lithium ion battery (li-ion). In the addition to the little solar lighting project that i was working on i have created this little solar charge controller to charge lithium ion battery […](image)



Play beautiful music on an Arduino thumb piano

Thu, 29 Sep 2016 18:00:15 +0000

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Pinned onto Arduino Blog

With an accelerometer and capacitive sensing, even a beginner can produce some great tunes with this DIY device. If you like making beautiful music, but would rather not actually practice this skill, perhaps this thumb piano and controller by producer/DJ Rob Blazey would be a good instrument to pick up. His project, called “Kalimbo,” employs an Arduino […](image)



40 dB attenuator

Thu, 29 Sep 2016 15:56:14 +0000

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Pinned onto Dangerous Prototypes

A 40 dB attenuator project by Hartmut DK5LH. Hartmut uses the attenuator to measure the power of his transmitter (2 watts) with a power meter for -80 dBm to -10 dBm The attenuator is used to reduce the output power of the set to a value that is less than 0.1 milliwatt. (-10 dBm) More details at PA1B’s […](image)



A multimeter heads-up display with Arduino glasses

Thu, 29 Sep 2016 13:11:03 +0000

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Pinned onto Arduino Blog

With Alain Mauer’s Arduino glasses and a Bluetooth multimeter, electrical data is always in view! If you’re in a job where you have to take readings inside a live electrical panel, one thing that’s inconvenient, and even dangerous at times, is having to look away from your hands to read your multimeter. With hopes of […](image)



Robotic fish swims under Arduino control

Thu, 29 Sep 2016 12:52:01 +0000

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Pinned onto Arduino Blog

This robotic fish is made from bent PVC pipe and moves its tail for locomotion. If you’re going to build an underwater vehicle, propeller control is the conventional solution. Eric Dirgahayu, however, created his underwater creature in the form of a fish, complete with a tail that powers it through the water, and pectoral fins that could, […](image)



Arduino Xylophone

Thu, 29 Sep 2016 04:31:00 +0000

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Pinned onto Freetronics

If you love playing music and making electronics, why not combined these interests and create your own Arduino musical instrument? Instructables member audreyobscura has put together a fantastic set of instructions detailing how you can build your own xylophone. The xylophone uses piezo sensors to detect when each note has been hit and then uses […](image)



MPPT Solar Charger Testing

Wed, 28 Sep 2016 21:49:22 +0000

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Pinned onto Soldernerd

In a previous post I have presented a design for an MPPT Solar Charger. In the mean time I have built a prototype and also wrote some software for it. So today I’ll go through my findings of what works well and what needs to be improved. And yes, there are some flaws in the […](image)



Design and Application Guide of Bootstrap Circuit for High-Voltage Gate-Drive IC

Wed, 28 Sep 2016 21:00:58 +0000

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Pinned onto EEWeb

The purpose of this paper is to demonstrate a systematic approach to design high-performance bootstrap gate drive circuits for high-frequency, high-power, and high-efficiency switching applications using a power MOSFET and IGBT. It should be of interest to power electronics engineers at all levels of experience. In the most of switching applications, efficiency focuses on switching […](image)



ESLOV is the amazing new IoT invention kit from Arduino

Wed, 28 Sep 2016 15:18:28 +0000

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Pinned onto Arduino Blog

For years, the open-source philosophy of Arduino has been the inspiration to robots, drones, medical and space research, interactive art, musical instruments, 3D printers, and so much more. Now, Arduino is on a mission to radically simplify the way you build smart devices. Introducing ESLOV, a revolutionary plug-and-play IoT invention kit. ESLOV consists of intelligent modules that join […](image)



μPC1237 based 2 channel speaker protector

Tue, 27 Sep 2016 17:04:20 +0000

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Pinned onto Dangerous Prototypes

Dilshan Jayakody has published a new build: When working with expensive speaker system, speaker protector is an essential item to avoid any damages to speakers. In this project we build low cost speaker protector by using NEC’s μPC1237 IC. The circuit in this project is based on μPC1237 datasheet and it is specifically modified to […](image)



ESP8266 WeatherStation Color

Tue, 27 Sep 2016 05:51:37 +0000

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Pinned onto Squix Techblog

Yesterday I started playing around with a TFT color display connected to the ESP8266. First I adapted example code to download BMP files to the flash memory, and boy, this display has some nice intense colors! To get an idea how a color version of the Weatherstation would look like I got a little creative […](image)



Keyless piano project using Arduino uno

Tue, 27 Sep 2016 05:03:20 +0000

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Pinned onto Gadgetronicx

Keyless piano using Arduino is sort of sequel to the DIY fun piano i have published in this website. In this project i have eliminated the need of buttons involved to play the piano. Here i have used IR in place of buttons. Let’s get into the construction and building part of this project. PARTS […](image)



IoT Wardrobe

Mon, 26 Sep 2016 23:06:00 +0000

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Pinned onto Freetronics

This intelligent wardrobe system automatically reminds you of the types of clothing and accessories you will  need based on the weather! Not only does it provide these recommendations,  but using a clever LED indicator system it also reminds you of where the different items you will require are located! For example the wardrobe might recommend that you […](image)



Automotive CAN Transceivers

Mon, 26 Sep 2016 20:00:38 +0000

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Pinned onto EEWeb

This document provides application information for the transceiver TLE7250X from Infineon Technologies AG as Physical Medium Attachment within a Controller Area Network (CAN). The CAN protocol uses a lossless bit-wise arbitration method of conflict resolution. This requires all CAN nodes to be synchronized. The complexity of the network can range from a point-to-point connection up […](image)



Restoring a vintage Xerox Alto day 8: it boots!

Mon, 26 Sep 2016 17:05:00 +0000

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Pinned onto Ken Shirrif

We’ve been restoring a Xerox Alto from the 1970s for several months, and we finally got it to boot and run some programs! There’s still some hardware debugging ahead of us, since the Alto drops into the debugger for many programs, but we’re quite happy to see the system running. In this post, I describe […](image)



Sonicare toothbrush teardown: microcontroller, H bridge, and inductive charging

Mon, 26 Sep 2016 15:59:28 +0000

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Pinned onto Dangerous Prototypes

Ken Shirriff did a teardown of a Sonicare electric toothbrush: The photos below show the top and bottom of the toothbrush internals. I expected to find a simple, low-cost mechanism, so I was surprised at how much complexity there was inside. The vibration mechanism (right) is built from multiple metal and plastic parts screwed together, requiring […](image)



Reverse engineering a server CPU voltage regulator module

Mon, 26 Sep 2016 14:56:35 +0000

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Pinned onto Dangerous Prototypes

Andy Brown wrote an article on reverse engineering a CPU voltage regulator: A recent ebay fishing expedition yielded an interesting little part for the very reasonable sum of about five pounds. It’s a voltage regulator module from a Dell PowerEdge 6650 Xeon server. I originally bought this because I had the idea of salvaging parts […](image)



Building a sweet plastic MIDI controller

Mon, 26 Sep 2016 14:44:59 +0000

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Pinned onto Arduino Blog

With parts from a bathroom organizer and arcade buttons, Alex “GlacialGeyser” made his own MIDI machine. MIDI controllers can be great instruments to supplement your musical skills. As seen in the video below, Alex’s project is no exception, and he’s able to produce some really beautiful music using it and a keyboard. Physically, he created this out […](image)



A DIY interactive book that uses digital gestures

Mon, 26 Sep 2016 08:25:49 +0000

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Pinned onto Arduino Blog

Digital and craft maker lab Tazas recently worked with a group of master students on an interactive book/prototype to reflect on how gestures like swiping have become as natural as shaking hands. Digital Gestures is a metaphor of the human body’s physiological senses, which identifies 10 actions inherent to our daily interactions with technology: drag and drop, […](image)



Arduino Stopwatch

Sun, 25 Sep 2016 23:49:00 +0000

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Pinned onto Freetronics

If you are looking for a very simple Arduino project to learn more about Arduino coding, this project is perfect for you. Conor M has built an Arduino stopwatch which uses an LCD Keypad Shield to provide the buttons and screen for your stopwatch. The project requires you to simply plug in the shield and […](image)



App note: General overview of IR transmission in free ambient

Sun, 25 Sep 2016 17:00:23 +0000

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Pinned onto Dangerous Prototypes

Vishay’s general information about IR transmission in free ambient. Link here (PDF) Free ambient IR data transmission, IR remote control as well as most opto-electronic sensors and light barrier systems work with an optical wavelength between 870 nm and 950 nm. The emitter and detector components are highly efficient in this near IR wavelength band […](image)



Sonicare toothbrush teardown: microcontroller, H bridge, and inductive charging

Sun, 25 Sep 2016 16:00:00 +0000

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Pinned onto Ken Shirrif

  My Sonicare electric toothbrush recently quit working, so I took it apart and found some interesting circuitry inside. There’s much more complexity than I expected inside a toothbrush, especially in the mechanism that drives the brush head. Internally, the brush appears to be designed for quality rather than inexpensive manufacturing. Unfortunately, moisture can get […](image)



App note: Using Vishay infrared receivers in a Wi-Fi environment

Sun, 25 Sep 2016 13:00:26 +0000

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Pinned onto Dangerous Prototypes

2.4Ghz and 5 Ghz Wi-fi signals can sometimes affect IR receivers, here’s Vishay’s app note about them. Link here (PDF) In recent years, Wi-Fi connectivity has penetrated most consumer electronic devices used for media reproduction. New TVs, satellite receiver and cable boxes, and streaming devices are more often than not built with Wi-Fi capabilities at […](image)



Skill Sunday: Uploading to your Arduino via a Network

Sun, 25 Sep 2016 06:43:00 +0000

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Pinned onto Freetronics

Although it is fairly straight forward to upload a sketch to your Arduino by plugging it into your computer, there are certain times when this can be very inconvenient. For example, imagine you have an Arduino under your house collecting temperature and humidity values and you need to push a bug fix to your board. […](image)



μPC1237 based 2 channel speaker protector

Sat, 24 Sep 2016 15:52:00 +0000

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Pinned onto Dilshan R Jayakody

When working with expensive speaker system, speaker protector is an essential item to avoid any damages to speakers. In this project we build low cost speaker protector by using NEC’s μPC1237 IC. The circuit in this project is based on μPC1237 datasheet and it is specifically modified to work with 24V AC power source and […](image)



One Phase Power Meter

Sat, 24 Sep 2016 14:00:51 +0000

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Pinned onto EEWeb

  The One Phase Power Meter Reference Design provides the example for implementing One Phase Power Meter using Kinetis® M series MCUs. With the growing consumption of energy worldwide, particularly in the residential market, utility providers need increasingly accurate and cost-effective energy metering solutions. PROJECT DESCRIPTION The Kinetis M series single-phase electricity meter reference design […](image)



WiFi Toilet Vacancy Sensor

Sat, 24 Sep 2016 09:57:00 +0000

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Pinned onto Freetronics

Do you ever get up from your desk to go to the bathroom only to find that it is occupied? With this cool project from hassaku you can use a number of sensors, a buzzer,  and a Spark Core to create a toilet vacancy sensor. The Spark Core interfaces with a Google Chrome extension which […](image)



HAL 9000 reimagined as a useless machine

Fri, 23 Sep 2016 19:48:19 +0000

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Pinned onto Arduino Blog

GeekCon participants add a switch and actuator to a HAL 9000 model for the world’s largest “leave-me-alone box.” You’ve probably seen the silly boxes that when you flip a switch to turn it “on,” an arm comes out to turn itself “off” again. At this year’s GeekCon Makers conference, participants decided to make a useless […](image)



Using the XMEGA Clock System

Fri, 23 Sep 2016 18:30:04 +0000

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Pinned onto EEWeb

The Atmel® XMEGA® Clock System is a set of highly flexible modules that provides a large portfolio of internal and external clock sources. An internal high-frequency PLL and a flexible prescaler block provide a vast amount of possible clock source configurations, both for the CPU and peripherals. An external oscillator failure detector and optional automatic […](image)



An Arduino VU meter for classrooms

Fri, 23 Sep 2016 14:34:21 +0000

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Pinned onto Arduino Blog

With his beautifully-colored classroom “noise-o-meter,” Mr. Jones knows when things are getting out of hand. When you were in school (or if you are in school) the teacher likely told the class to be quiet, perhaps repeating him or herself over an over during the day. The teacher, however, likely never really defined what is […](image)



DIY Calculator

Fri, 23 Sep 2016 09:37:00 +0000

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Pinned onto Freetronics

Although you can buy your own calculator very cheaply you can learn a lot by building your own. Kale_3d has developed an Arduino based calculator that uses a keypad and an LCD display to your calculations. The project is very well documented, including instructions on how to build the case, full code examples and a […](image)



Build your own robotic vacuum from scratch

Fri, 23 Sep 2016 00:56:07 +0000

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Pinned onto Arduino Blog

This dust buster-based robotic vacuum may or may not work as well as a Roomba. If you’re fascinated by the idea of a robotic vaccum cleaner to keep you from having to do certain chores, you could buy an iRobot, or you could make your own instead. This particular DIY model uses four motors for locomotion, an Arduino […](image)



An animatronic talking takeout container

Thu, 22 Sep 2016 20:14:38 +0000

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Pinned onto Arduino Blog

An Arduino plus fake food and audio capabilities equals something truly unique! Randy “randofo” Sarafan had an idea when he was in college: a takeout container that talked. To the world’s great benefit, now that he knows about electronics, he finally made this dream a reality. Using an Arduino Mega with a Seed Studio Music Shield, […](image)



Restoring a Xerox Alto day 7: experiments with disk and Ethernet emulators

Thu, 22 Sep 2016 15:56:00 +0000

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Pinned onto Ken Shirrif

In this Alto restoration session we controlled the Alto’s disk drive with an FPGA disk emulator and attempted booting the Alto with a BeagleBone-based Ethernet emulator. The GIF below shows the drive performing seeks as commanded by the emulator. (With the cover off the Diablo drive, you can see the disk head floating above the […](image)



IDE 1.6.12 released with Sierra support and more

Thu, 22 Sep 2016 14:15:43 +0000

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Pinned onto Arduino Blog

A new version of the Arduino IDE (1.6.12) supporting OSX Sierra is available for download! All OSX users updating to Sierra are invited to also update the IDE to avoid crashes when uploading sketches. This update includes an experimental integration with Arduino Cloud API already used by Arduino Create. The Arduino Cloud is simple tool to […](image)



IoT Propane Tank

Thu, 22 Sep 2016 00:49:00 +0000

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Pinned onto Freetronics

If you live in a remote area it is possible that you are not serviced by a mains gas connection. If this is the case you are probably relying on a propane tank. Wouldn’t it be great if you could reliably track the amount of gas remaining in your tank so that you could schedule […](image)



Industry Standard Single-Ended Current Mode PWM Controller

Wed, 21 Sep 2016 21:00:27 +0000

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Pinned onto EEWeb

The ISL8843 is an industry standard drop-in replacement for the popular 28C43 and 18C43 PWM controllers suitable for a wide range of power conversion applications including boost, flyback, and isolated output configurations. Its fast signal propagation and output switching characteristics make this an ideal product for existing and new designs. Features include 30V operation, low […](image)



Wifi enabled 8×64 pixel LED matrix display

Wed, 21 Sep 2016 15:00:52 +0000

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Pinned onto Dangerous Prototypes

Raj over at Embedded Lab has just finished a new project article about Wifi-enabled LED matrix display using ESP8266: This project is a modification of my previous Bluetooth-enabled LED matrix display project, which used 8×64 monochromatic LED matrix (total 512 LEDs) for displaying scrolling text message. The original project used Bluetooth for display data transfer […](image)



Arduino Disco Lights

Wed, 21 Sep 2016 10:20:00 +0000

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Pinned onto Freetronics

If you have managed to blink an LED using an Arduino you should be able to easily build this project! ToughRocket52 has put together a fantastic instructable which teaches you how to build your own Arduino controlled disco lights. Not only do these disco lights look fantastic, but you could very easily modify the project […](image)



PIXIE is an Arduino-based NeoPixel watch

Tue, 20 Sep 2016 20:59:31 +0000

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Pinned onto Arduino Blog

Not looking for a smartwatch? PIXIE is an Arduino-based NeoPixel wearable device that not only keeps time, but will also keep your geek cred intact. You won’t find any numbers on this watch; instead, PIXIE uses LEDs to reveal the time–hours in blue, minutes in red, and seconds in green. Beyond that,  a capacitive touch switch on its strap will activate a […](image)



How to run C programs on the BeagleBone’s PRU microcontroller

Tue, 20 Sep 2016 16:03:00 +0000

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Pinned onto Ken Shirrif

This article describes how to write C programs for the BeagleBone’s microcontrollers. The BeagleBone Black is an inexpensive, credit-card sized computer that has two built-in microcontrollers called PRUs. By using the PRUs, you can implement real-time functionality that isn’t possible in Linux. The PRU microcontrollers can be programmed in C using an IDE, which is […](image)



Capture time-lapses with a steel and aluminum camera slider

Tue, 20 Sep 2016 14:22:33 +0000

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Pinned onto Arduino Blog

Using an Arduino, along with a stepper motor and ball bearings, YouTuber GreatScott! has created a very smooth camera slider. Time-lapse sequences can be interesting on their own, but if you can add motion to the camera, this adds a really neat element. To give a little extra flair to his video production, GreatScott! built his own […](image)



The MR-808 is a robotic drum “synthesizer”

Mon, 19 Sep 2016 21:30:19 +0000

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Pinned onto Arduino Blog

The MR-808 robotic drum machine looks like a gigantic Roland synthesizer, but plays with real instruments! The Roland TR-808 was released in 1981 and was meant to replace a human drummer for practice purposes, but was instead used to produce music itself, helping to birth the electronic, techno, and hip hop genres. Moritz Simon Geist […](image)



HDMI 2.0 Implementation on Kintex-7 FPGA GTX Transceivers

Mon, 19 Sep 2016 20:00:14 +0000

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Pinned onto EEWeb

This application note covers the design considerations of a High-Definition Multimedia Interface (HDMI™) 2.0 implementation on the Kintex®-7 FPGA GTX transceiver using the performance features of the following Xilinx® LogiCORE™ IP cores: HDMI 1.4/2.0 with HDCP 1.4/2.2 Transmitter Subsystem HDMI 1.4/2.0 with HDCP 1.4/2.2 Receiver Subsystem Video PHY Controller The design features the transmit-only and […](image)



Meet Floris.cc: a new Genuino reseller in The Netherlands

Mon, 19 Sep 2016 17:57:40 +0000

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Pinned onto Arduino Blog

Joining a list of others from Germany, Spain, Italy and Portugal, Europe’s latest Genuino reseller hails from The Netherlands! Let’s give a warm welcome to Pieter Floris, who we recently had a chance to catch up with to learn a little more about the work he’s been doing with Floris.cc! – Tell us a bit more about Floris.cc. Early in 2009, I was searching for a good “learning kit […](image)



When you need multiple analog inputs for your ESP8266 application

Mon, 19 Sep 2016 14:56:57 +0000

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Pinned onto Dangerous Prototypes

Tinkermax writes: In specific situations you can get away with having only one ADC by multiplexing your sensors. In my scenario, because I was measuring totally unrelated things, this was not possible. The most obvious approach is to add an external ADC. The drawback is that this requires you to get to grips with how […](image)



Don’t look at laser with remaining eye

Mon, 19 Sep 2016 04:01:00 +0000

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Pinned onto News

  LASER is an acronym of “Light Amplification by Stimulated Emission of Radiation”. To be short is an amplified and focused beam of coherent light. While there are few kinds to chose from, most popular ones for my application would be CO2 and Fiber. But as I had access to one more exotic one I […](image)



Knock Controlled Night Light

Mon, 19 Sep 2016 00:05:00 +0000

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Pinned onto Freetronics

Have you ever woken up in the middle of the night and stumbled around trying to turn on your light only to end up painfully bumping into things? With this project from Peter Javorsky you can build your own night light which will turn on with a simple knock. The project uses a piezo sensor […](image)



App note: High-speed level shifting using Si8XXX isolators

Sun, 18 Sep 2016 17:18:17 +0000

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Pinned onto Dangerous Prototypes

Silicon Lab’s Si86xx which provides digital isolation and voltage level shifting while Si823x as ISOdrivers, Link here (PDF) Voltage level shifting is common in analog and mixed-signal system applications. While several technologies implement level shifting (e.g., HVIC processes, discrete circuits, dedicated level shifting ICs), recent advances in CMOS isolation technology enables fast, reliable, and highly-integrated […](image)



App note: Novel current-sense measurement with automatic offset correction

Sun, 18 Sep 2016 16:52:05 +0000

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Pinned onto Dangerous Prototypes

Silicon Labs’ application note about a low power current measurement circuit using TS1001 nano power op-amp paired with low-power CY8C38 microcontroller, Link here (PDF) Pairing a simple circuit using nanopower analog op amps with a microcontroller can monitor single battery cells and solar harvesters. Pairing up a 0.65 V/1 µA nanopower op amp with the […](image)



Build Your Own Oscilloscope!

Sun, 18 Sep 2016 08:44:00 +0000

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Pinned onto Freetronics

An oscilloscope is a must have tool for any electronics enthusiast. Typically oscilloscopes are extremely expensive costing upwards of $600 meaning that price can be a real barrier to owning your own. With this fantastic project from BramMylemans you can use an Arduino to create your own oscilloscope very cheaply! Not only is it great […](image)



App note: USB field firmware updates on MSP430 MCUs

Sat, 17 Sep 2016 15:08:36 +0000

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Pinned onto Dangerous Prototypes

TI’s application note: USB field firmware updates on MSP430 MCUs (PDF!) With the advent of USB, end users can perform firmware upgrades in the field by simply attaching the device via USB and executing an application on the host PC. Such an approach has numerous advantages: Problems discovered after product release can be fixed. Reduced […](image)



Automatic WiFi Rebooter

Sat, 17 Sep 2016 07:40:00 +0000

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Pinned onto Freetronics

Does your WiFi router frequently drop out and need rebooting? This can be a very frustrating problem! However, like many problems, it can easily be solved with Arduino. This awesome project from Sameer sets up an Arduino which monitors your wifi connection, whenever the wifi is down a warning buzzer sounds and then a relay […](image)



ISL29501 Sand Tiger Optics

Fri, 16 Sep 2016 18:30:47 +0000

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Pinned onto EEWeb

This application note describes important optical and opto-mechanical features of the ISL29501 Sand Tiger distance measurement system. Topics discussed include optical system description, System Field of View (FOV), signal photocurrent vs target distance, optical crosstalk mitigation and ambient light mitigation. In the section on system FOV, the geometrical cone model is introduced and compared with […](image)



Analyze your world with the WiSci portable spectrometer

Fri, 16 Sep 2016 14:57:40 +0000

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Pinned onto Arduino Blog

Spectroscopy is an incredible tool for chemical analysis–and now you can make your own Bluetooth-enabled device with an Arduino Pro Mini. If you took advanced chemistry classes, you may have had the opportunity to work with a spectrometer. It probably seemed like a magical gadget, identifying the chemicals in a substance through its light characteristics unlike the […](image)



Capcom CPS2 security programming guide

Fri, 16 Sep 2016 13:19:31 +0000

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Pinned onto Dangerous Prototypes

Eduardo Cruz from Arcade Hacker  writes: Dear all, after a few months of testing we are extremely happy to release the new clean desuicide / security programing method for Capcom’s CPS2 hardware. This guide is the result of almost two years of work by an small group of arcade enthusiasts to unravel the secrets of […](image)



Build your own Eject-A-Bed

Thu, 15 Sep 2016 22:37:00 +0000

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Pinned onto Freetronics

Do you ever struggle to get your kids out of bed in the morning? With this awesome hack from Jamie Dixon you can modify an old adjustable hospital bed so that you can control it over the internet, from anywhere in the world. With a simple push of a button on your phone or computer […](image)



A community-made, Arduino-powered interactive town map

Thu, 15 Sep 2016 21:42:34 +0000

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Pinned onto Arduino Blog

A group of students from Farmington, Connecticut partnered with artist Balam Soto and master teachers Earl Procko and Jim Corrigan to create a community-based sculpture project that allows people to explore the sights, sounds and history of their town through new media. The installation runs on Arduino Uno and XBee, and is comprised of two panels which act as viewing […](image)



PyroGraph is a plotter that burns images on paper

Thu, 15 Sep 2016 18:39:12 +0000

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Pinned onto Arduino Blog

Inspired by the traditional thermal printers, the PyroGraph is an experimental plotter that uses a soldering iron to burn images onto paper. Created by the team of Bjørn Karmann, Lars Kaltenbach and Nicolas Armand, PyroGraph works by analyzing any picture and then converting it into dots that are scorched onto a piece of paper with a 450 °C tip. The time of contact between the iron […](image)



Restoring YC’s Xerox Alto: how our boot disk was trashed with random data

Thu, 15 Sep 2016 16:13:00 +0000

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Pinned onto Ken Shirrif

In the previous Xerox Alto restoration session, we got the disk working, but the system didn’t boot. After much investigation, I discovered the explanation for the boot failure: the disk has been overwritten with random data! This article describes my journey through the Alto microcode to determine what happened. Inserting a disk into the Xerox […](image)



Experimenting with MAX6955

Thu, 15 Sep 2016 15:19:05 +0000

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Pinned onto Dangerous Prototypes

Florin wrote an article about experimenting with MAX6955: My experimenting actually started with MAX6954. After many failed tries due to SPI issues (Maxim uses a special interpretation of the protocol, I read), I switched to MAX6955. MAX6955 is the I2C sibling of MAX6954 (which uses SPI). They both have identical LED driving abilities, only the […](image)



Build an Arduino Robotic Arm

Thu, 15 Sep 2016 06:02:00 +0000

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Pinned onto Freetronics

If you love robotics this project is for you! Lifehacker have put together a fantastic set of instructions detailing how and why you should build your own robotic arm. Not only is building your own robotic arm super cool, but it is also fairly comprehensive in teaching you about lots of Arduino basics. Indeed, once […](image)



Adding ADC to Microcontrollers without ADC

Thu, 15 Sep 2016 00:16:43 +0000

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Pinned onto Dangerous Prototypes

Scott Harden writes: I recently had the need to carefully measure a voltage with a microcontroller which lacks an analog-to-digital converter (ADC), and I hacked together a quick and dirty method to do just this using a comparator, two transistors, and a few passives. The purpose of this project is to make a crystal oven […](image)



Guidelines for using the S12Z Debug Module

Wed, 14 Sep 2016 21:00:29 +0000

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Pinned onto EEWeb

The S12ZDBG module includes debugging features that were not available on S12/S12X predecessors. This application note provides guidelines for using these module features. This document describes the superset of debugging features offered by S12ZDBG V2 and V4, henceforth referred to as DBG module. The S12ZDBG V3 (Debug Lite) includes a limited subset of the features that are […](image)



Build your own robotic arm out of cardboard

Wed, 14 Sep 2016 20:47:04 +0000

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Pinned onto Arduino Blog

From our Chairigami Maker Faire booth furniture to Google VR headsets, we’ve seen various use cases for cardboard. Added to that list is a robotic arm, courtesy of Uladz Mikula. According to the Maker, the design can be replicated in two hours using Arduino and four servo motors. Aside from the electronics, the project also calls for a piece of hardboard for the […](image)



Arduino IDE among Desktop Bridge apps now on Windows Store

Wed, 14 Sep 2016 16:39:45 +0000

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Pinned onto Arduino Blog

Back at Build 2016, the Windows team announced the Desktop Bridge, allowing developers to bring their existing desktop apps and games over to the Universal Windows Platform (UWP) by converting their app or game with the Desktop App Converter and then enhancing and extending it with UWP functionality. This enables the path to gradually migrate […](image)



Play the guitar on a guitar bag

Wed, 14 Sep 2016 15:34:29 +0000

Pinned onto Arduino BlogWhile exploring new tangible interfaces, designer Martin Hertig wanted to do something a bit different. He chose to transform the zippers on a guitar bag into a fully-functional instrument. Rather than strum the strings of the guitar, he simply pulls the bag’s zippers to jam: one zip for playing notes or chords, another for changing the bar, and a third for the vibrato. As […] [...]



Who Else Wants To Develop Their Own Electronic Product?

Wed, 14 Sep 2016 10:43:35 +0000

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Pinned onto Build Electronic Circuits

Do you have an idea for an electronic product that you know will sell? Do you know how to create it? Back in the days, my friends Olav and Elias and I were certain that we had a revolutionary product idea. We wanted to develop a touch-less controller for games, so that you could play […](image)



Arduino Bike Computer

Wed, 14 Sep 2016 03:13:00 +0000

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Pinned onto Freetronics

Most bike riders will have some sort of “bike computer” which tracks how far and fast they have been riding. Very few bike riders, however, would have a good idea of how their bike computer works! If you fall into this category, or just like the idea of making your own bike computer, this project is […](image)



CO2, temperature and humidity monitor

Tue, 13 Sep 2016 22:46:36 +0000

Pinned onto Dangerous PrototypesAn open source CO2 monitoring project from Roving Dynamics: The project described below uses a MH-Z16 or MH-Z19 CO2 sensor and a DHT-22 (or DHT-11 if less accuracy is required) to measure the Temperature and Humidity. It has a 4 line by 20 character LCD Display to show the current readings and status, a warning alarm […] [...]



Arduino-powered roller blinds

Tue, 13 Sep 2016 21:11:13 +0000

Pinned onto Arduino BlogTired of adjusting your blinds depending on outside lighting conditions? YouTuber “Dial” has the solution! Perhaps you’ve seen hacks where people hook a servo up to blinds to flip them open and shut. If, however, you have the kind of blinds that need to be pulled all the way up to let light in, things become […] [...]



Arduino Wiring is the latest addition to Windows 10 IoT Core

Tue, 13 Sep 2016 21:08:09 +0000

Pinned onto Arduino BlogLast year, we announced on the blog how Windows became the first Arduino certified OS and introduced Windows Virtual Shields for Arduino and Windows Remote Arduino. Now, engineers at Windows have published a blog post showing how you can use Windows 10 IoT Core to create or port Arduino Wiring sketches that will run on supported IoT Core […] [...]



An Arduino charging dock with Edison indicator lights

Tue, 13 Sep 2016 18:39:07 +0000

Pinned onto Arduino BlogBored with normal cell phone charging stations, “Makjosher” decided to make his own with pipe fittings and Edison bulbs. Makjosher’s charging station resembles a retro-looking light fixture more than a cell phone charger, but it seems to perform both functions quite well. Using an Arduino Uno in conjunction with a current sensor, his charging station senses […] [...]



Ultrasonic Anemometer

Tue, 13 Sep 2016 13:08:39 +0000

Pinned onto Dangerous Prototypes  Lukas Fassler has designed and built an Ultrasonic Anemometer project with Dirty Board PCBs. Tests performed so far The PIC32 can be programmed from a PICKit3 via the ICSP header without any issues. Power consumption is as expected. Like the previous version it draws 45mA@12V (programmed) and the other two rails come up with +3.310 […] [...]



New ESP8266 board

Tue, 13 Sep 2016 03:30:49 +0000

Pinned onto Dangerous PrototypesM0xpd writes: You can well see it is an engineering sample, because I’m squeezing the wrong size packages into locations (quarter Watt resistors where eighth Watt components should be, etc) and using a mishmash of different component types, but you’ll forgive me, I’m sure. The new design presents the Expressif ESP8266 device on an Arduino-sized […] [...]



(Even More) New Stock!

Mon, 12 Sep 2016 22:34:00 +0000

Pinned onto FreetronicsLast week we announced that we had just received a shipment containing lots of new Freetronics stock.  We are very excited to let you know that we have just received another shipment with even more new stock! Items back in stock include our EtherMega, 4-Channel Relay Driver Module, Watchdog Timer Module, Accelerometer Module, Logic Level Converter Module, […] [...]



An interactive ball for your dog’s remote entertainment

Mon, 12 Sep 2016 21:12:11 +0000

Pinned onto Arduino BlogRecently presented at Disrupt SF Hackathon 2016, this modified hamster ball rolls and dispenses treats while you’re away! Creators Anthony Alayo, James Xu, and Lawrence Chang don’t like the idea of leaving doggies alone all day to fend for themselves. Although these companions will generally wait for their owners to get home, this surely gets […] [...]



PCB Design Guidance for SPM®

Mon, 12 Sep 2016 20:00:34 +0000

Pinned onto EEWebInverter system boards are becoming more compact and complex while requiring greater power density. This challenge can be met by adopting a Fairchild Smart Power Module, or SPM® . PCB layout design is very crucial in improving reliability, performance, and manufacturability while minimizing noise. This application note describes several considerations and guidelines for PCB layout […] [...]



CO2, Temperature and Humidity Monitor

Mon, 12 Sep 2016 18:48:50 +0000

Pinned onto RodyneCO2 Monitoring is mandatory in many workplaces and it affects two of my clients directly in Barrel Halls where wine is stored and aged in temperature and environmentally controlled areas. The table below shows the affects of various concentrations in the air. 250-350ppm Normal background concentration in outdoor ambient air 350-1,000ppm Concentrations typical of occupied indoor […] [...]



A room light controller with its own light display

Mon, 12 Sep 2016 18:47:58 +0000

Pinned onto Arduino BlogHansi (aka “Natural Nerd”) wasn’t content simply controlling his room’s lighting, so he had his control box illuminate along with it! In order to control lighting intensity, you could hook up a potentiometer directly, but Hansi decided to instead connect four potentiometers to an Arduino Nano to control an external light source. These four inputs are attached to analog […] [...]



Restoring YCombinator’s Xerox Alto day 6: Fixed a chip, data read from disk

Mon, 12 Sep 2016 17:53:00 +0000

Pinned onto Ken ShirrifIn today’s Xerox Alto restoration session we investigated why the disk drive isn’t working and found a failed chip. With this chip repaired, we were able to read a block from disk, although the system still doesn’t boot. (In previous episodes, we fixed the power supply, got the CRT display working, cleaned up the disk […] [...]



LipSync is an Arduino-based assistive device for smartphone use

Mon, 12 Sep 2016 15:45:55 +0000

Pinned onto Arduino BlogWith a mouth-operated joystick and “sip and puff” controls, the LipSync aims to make smartphones more accessible for everyone. For the huge number of people that use them, smartphones have certainly made their lives easier. Unfortunately, these amazing gadgets are difficult to use for those with limited or nonexistent use of their arms and hands. The […] [...]



Do you want to see the unseen?

Mon, 12 Sep 2016 04:02:01 +0000

Pinned onto KoruKesuI have always been fascinated by Infrared photography. But it was associated with big cameras and complicated rework process. Never considered using small cameras for this task until yesterday. After taking videos for new experiment (count bypassing vehicles) I switched to modified camera and captured short video of surroundings. Was surprised that camera worked flawlessly […] [...]



3 km ranged FM transmitter circuit

Mon, 12 Sep 2016 03:21:41 +0000

Pinned onto GadgetronicxFM transmitters have been used all over the world for communication. The simplicity of building a FM circuit made it so popular among other modulation techniques. Today i have come up with FM transmitter circuit which has a range of about 3 Km approximately. The circuit diagram was pretty wide and i cannot fit it into […] [...]



Monash University Robot Building Competition Video!

Sun, 11 Sep 2016 22:47:00 +0000

Pinned onto FreetronicsTo follow up on last week’s Robot Build Competition recap, Jon has produced a fantastic video highlighting the event. You can check it out below:  If participating in, or reading about this awesome robotics competition has inspired you to start creating your own robots why not check out the 2WD Robot Chassis Kit. This kit […] [...]



App note: Class D audio amplifier basics

Sun, 11 Sep 2016 17:00:54 +0000

Pinned onto Dangerous PrototypesClass D audio amplifier an efficient amplifier by Infineon Technologies, Link here A Class D audio amplifier is basically a switching amplifier or PWM amplifier. There are a number of different classes of amplifiers. This application note takes a look at the definitions for the main classifications. Class D audio amplifier an efficient amplifier by Infineon Technologies, […] [...]



App note: How to pick a click-and-pop suppressor

Sun, 11 Sep 2016 15:51:27 +0000

Pinned onto Dangerous PrototypesAudio noises click-and-pop suppression method from Maxim. Link here (PDF) This application note presents the MAX9890 and MAX9892 which use different approaches to remove audible click and pop from headphones. Each device is uniquely suited to different applications. Audio noises click-and-pop suppression method from Maxim. Link here (PDF) This application note presents the MAX9890 and […] [...]



Skill Sunday: Graphing Data From Arduino

Sun, 11 Sep 2016 06:41:00 +0000

Pinned onto FreetronicsThis week on Skill Sunday we are going to be learning about how to visualise data captured using Arduino. As fantastic as the Arduino IDE can be, it doesn’t provide an easy way to graph data that you receive from sensor inputs on your Arduino projects. Wouldn’t it be awesome to be able to visualise […] [...]



App note Quick-Start: Driving 14-segment displays with the MAX6954

Sat, 10 Sep 2016 14:42:09 +0000

Pinned onto Dangerous PrototypesGuidelines from Maxim on using the MAX6954 to drive 14-segment monocolor LEDs, app note here (PDF!): This article is how-to guide, intended as a quick learning aid for engineers considering using the MAX6954 to drive 14-segment monocolor LEDs. The MAX6954 is a versatile display driver, capable of controlling a mix of discrete, 7-segment, 14-segment, and 16-segment […] [...]



Motion Sensing & LED Control

Sat, 10 Sep 2016 14:00:45 +0000

Pinned onto EEWebThe Motion Sensing & LED Control Reference Design demonstrates how to use Zilog’s Z8FS040 ZMOTION MCU with the IXYS LDS8710 high-efficiency LED driver and explains how to implement features such as ambient light detection and LED dimming in addition to passive infrared motion detection. It also illustrates how the combined capabilities of both products are […] [...]



An Arduino Terminal

Sat, 10 Sep 2016 07:41:35 +0000

Pinned onto Dangerous Prototypes  Peter Scargill writes, “As it happens I’m experimenting on a 1284 chip which while being Arduino-compatible kind of, it does have another serial port, so without disconnecting my FTDI – I hooked up the second serial port to the home control serial and fired the DEBUG command at the latter. As you can see […] [...]



Relive some arcade memories with a desktop coin pusher

Fri, 09 Sep 2016 20:47:26 +0000

Pinned onto Arduino BlogRemember Ryan Bates’ mini vending machine, the Venduino? Well, the Maker has now built a wooden coin pusher that’ll complement his earlier project quite nicely. If you’ve seen a machine at an arcade with coins hanging off an edge, you probably thought, “Wow, if I just put one more quarter in, I’ll get like $10 back.” Although perhaps […] [...]



Use an Arduino Uno to interface with your Apple II

Fri, 09 Sep 2016 19:54:07 +0000

Pinned onto Arduino BlogInstead of a huge box of disks, David Schmenk decided to use an Arduino to add a massive amount of storage. For Apple II enthusiasts, loading games or other programs via a normal disk drive works, but since storage capabilities have exploded since the 1980s, Schmenk’s setup uses an Arduino Uno to access an SD […] [...]



Extending the Functionality for Low-Cost Motor Control Applications

Fri, 09 Sep 2016 18:30:13 +0000

Pinned onto EEWebThe motor control industry has been focusing on designing low-cost motor control drives for various applications. The consumer demand for low-cost motor control applications is driving this trend. Microchip has recently introduced the PIC32MM family of microcontrollers, which is capable of addressing the low-cost motor control requirements. The low-cost solution benefits from the capability of […] [...]



Drive an RC car with first-person view

Fri, 09 Sep 2016 16:57:00 +0000

Pinned onto Arduino BlogIf you’ve ever dreamt of sitting in the driver’s seat of an RC car, you’ll love this recent project from Paul Yan. The designer has hacked together a first-person driving experience using a natural steering wheel that lets you feel like you’re playing a race kart game in real life. As he describes in the video […] [...]



Free PCB coupon via Facebook to 2 random commenters

Fri, 09 Sep 2016 16:56:19 +0000

Pinned onto Dangerous PrototypesEvery Friday we give away some extra PCBs via Facebook. This post was announced on Facebook, and on Monday we’ll send coupon codes to two random commenters. The coupon code usually go to Facebook ‘Other’ Messages Folder . More PCBs via Twitter on Tuesday and the blog every Sunday. Don’t forget there’s free PCBs three […] [...]



Build Your Own Sumo-Bot

Fri, 09 Sep 2016 06:39:00 +0000

Pinned onto FreetronicsIf you felt inspired to make your own robot after reading about the Monash University Robotics Competition, this project is for you! Instructables member tsunx has written a fantastic tutorial which outlines how you can can build your own Sum-Bot which can be programmed from your smartphone, sense enemy robots and follow a line. This […] [...]



Upgrade your USB keyboard to Bluetooth with this Arduino device

Thu, 08 Sep 2016 20:36:21 +0000

Pinned onto Arduino BlogIf you have an old keyboard lying around and wish it were wireless, Maker DastardlyLabs has a solution. The “HID Relay” is a small adapter that uses an Arduino Pro Mini, a Bluetooth module, a USB host shield, and a few other components to upgrade any USB keyboard to Bluetooth. DastardlyLabs has made three videos to explain the […] [...]



Teardown of a Static fieldmeter

Thu, 08 Sep 2016 13:58:54 +0000

Pinned onto Dangerous PrototypesA teardown of a Static fieldmeter from Kerry Wong: Static fieldmeters (or electrostatic fieldmeters) are typically used for non-contact measurements of the electrostatic field strength (usually in kV) of charged objects. These are highly specialized test instruments and most hobbyists probably seldomly have the opportunity of coming across one. So in this post and a companion video […] [...]



The SEPIC switching converters

Thu, 08 Sep 2016 10:14:40 +0000

Pinned onto Open Electronics  The SEPIC configuration, a very useful one, is used in modern converters for mixed supply systems. Thanks to the availability of an always growing number of specialized integrated circuits that realize – with the help of very few external components – some complete and valid voltage regulators, today the switching technology is the most […] [...]